j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Added DAC support to PCF8591 driver

Browse source
This commit is contained in:
UncleRus 2017-10-13 00:49:15 +05:00
parent 715bc8148c
commit 60b671ea44
3 changed files with 54 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

36
extras/pcf8591/pcf8591.h
View file

@ -1,14 +1,16 @@
/**
* Driver for 8-bit analog-to-digital conversion and
* Driver for 8-bit analog-to-digital conversion and
* an 8-bit digital-to-analog conversion PCF8591
*
* Part of esp-open-rtos
* Copyright (C) 2017 Pham Ngoc Thanh <pnt239@gmail.com>
* 2017 Ruslan V. Uss <unclerus@gmail.com>
* BSD Licensed as described in the file LICENSE
*/
#ifndef _EXTRAS_PCF8591_H_
#define _EXTRAS_PCF8591_H_
#include <stdint.h>
#include <i2c/i2c.h>
#ifdef __cplusplus
@ -16,25 +18,33 @@ extern "C"
{
#endif
/**
* CAUTION: PLEASE SET I2C_FREQUENCY_400K IS 'false' IN 'i2c.h' FILE
*/
#define PCF8591_DEFAULT_ADDRESS 0x48
void pcf8591_init(void); //FIXME : library incomplete ?
/**
* Analog inputs configuration, see datasheet
*/
typedef enum {
PCF8591_IC_4_SINGLES = 0, //!< Four single-ended inputs
PCF8591_IC_DIFF, //!< Three differential inputs
PCF8591_IC_2_SINGLES_DIFF, //!< Two single-ended and differnetial mixed
PCF8591_IC_2_DIFFS //!< Two differential inputs
} pcf8591_input_conf_t;
/**
* Read input value of an analog pin.
* @param[in] addr Pointer to device
* @param[in] analog_pin pin number:
* 0 - AIN0
* 1 - AIN1
* 2 - AIN2
* 3 - AIN3
* @param[in] dev Pointer to device
* @param[in] conf Analog inputs configuration
* @param[in] channel Analog channel
* @return analog value
*/
uint8_t pcf8591_read(i2c_dev_t* dev, uint8_t analog_pin);
uint8_t pcf8591_read(i2c_dev_t *dev, pcf8591_input_conf_t conf, uint8_t channel);
/**
* Write value to analog output
* @param[in] dev Pointer to device
* @param[in] value DAC value
*/
void pcf8591_write(i2c_dev_t *dev, uint8_t value);
#ifdef __cplusplus